基于模型法的大豆抗倒伏评价方法研究
- 文章编号:
- 10.11861/j.issn.1000-9841.2023.01.0064
- 摘要:
- 为了创新大豆抗倒伏鉴定方法，为简单、快速鉴定大豆机械化生产中的抗倒伏性提供理论基础和技术支持，本研究以黑龙江省不同生态区主栽的大豆品种为材料，以大豆花期、结荚期和鼓粒期的茎秆强度、株高、地上部鲜重、地上部干重、地下部鲜重、地下部干重、植株含水量为指标，设计6种多因子抗倒指数，通过相关性分析探讨大豆抗倒伏最佳鉴定时期及抗倒指数，并利用通径系数分析各指标对最佳抗倒指数的贡献大小。结果表明：结荚期检测多因子抗倒指数1A[茎秆强度/（株高×地上部鲜重）×100]为简单、快速鉴定大豆抗倒伏的最佳技术模型，抗倒指数1A为0.02以上的材料均表现出很强的抗倒伏能力。通径系数分析表明对大豆抗倒伏性贡献最大的因子为茎秆强度（r=0.831**），而对大豆易倒伏贡献较大的因子为株高（r=-0.644**）和地上部鲜重（r=-0.627**）。无论从相关程度还是相对效果来看，茎秆强度对抗倒指数的影响作用都极为明显，正向直接效应最大（P1→y=0.652）。研究确立了快捷评价大豆抗倒伏性的技术模型：在大豆结荚期检测抗倒指数1A[茎秆强度/（株高×地上部鲜重）×100]。抗材倒指数1A>0.02的材料抗倒伏能力较强，茎秆强度对抗倒指数影响作用极大。
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备注/Memo
国家重点研发计划（2020YFD1000901-01）；黑龙江省农业科学院“农业科技创新跨越工程”专项（HNK2019CX22-14）。